Skip to main content

"We acquire and monitor Power Quality according to binding standards."

Dries Boone, General Manager, iba Benelux BVBA

Power Quality

Measuring and monitoring the electric power quality (EPQ) is a crucial tool for energy producers, grid operators and consumers alike to document supply reliability and voltage quality on the one hand. And to prove compliance with emission limits on the other hand, but also to analyze and thus prevent faults.

Selection of companies who already rely on Power Quality by iba


Business benefits



energy costs






voltage quality



emission limits






quality requirements

Talk to an expert

Fill out the form and a Power Quality Expert will contact you immediately.


Talk to an expert

Power Quality – Safety and Quality in Energy Grids

Power quality: The burden of proof is on energy producers

Distributed energy generation and the associated fluctuating provision of electrical power from renewable sources influences the stability of the power grid. Energy suppliers have to assure at all times that the energy fed into the public grid meets the quality criteria of the European standard EN 50160. This not only affects the "big" energy producers, but also companies operating their own power plants that feed energy into the public grid.

High power quality requires optimized facilities

Grid operators, too, have to comply with EN 50160. The requirements for transmission grids increase with the distributed structure and the use of power electronics, e.g. to control power flows or operating HVDC facilities where direct current is transmitted over very long distances.

In this context, not only monitoring of electrical power is important, but also monitoring of the controllers of electrical equipment such as converters in converter stations. The modular ibaPQU-S system enables data from the facility to be recorded together with the calculated quality characteristics and measured raw values centrally in ibaPDA. This enables users to thoroughly evaluate all data, recognize contexts and thereby determine the causes of faults or quality variations.

Moreover, the data provide important information about the dimensioning of the facility and its optimal operation.

Consumers are obliged to power quality

Electricity consumers influence the grid quality for example by power electronics devices, e.g. for frequency-regulated drives. Grid reactances and the harmonic factor of the currents create repercussions in the grid that impair the power quality in the supply grid.

Examples include high surge-like loads caused by starting and running of large machines such as the main drives of rolling mills or arc furnaces. Both energy producers and large-scale consumers must observe the "D-A-CH-CZ Technical rules for the assessment of power system perturbations" that specify limit values for the emission of "power system faults" for generating and consumer facilities.

The ibaPQU-S system is also capable of determining the characteristics required in this body rules and of monitoring compliance with the limit values. Moreover, power suppliers contractually agree with each large consumer the extent of disturbances they are allowed to inject into the grid.

A violation of the limit values can be punished with fines. Monitoring the electric power quality at the transfer point provides information about whether and what disturbances are fed into the grid.

Possible Applications for Power Quality by iba

The iba system provides a wide range of functions to monitor and optimize electrical power facilities

Continuous monitoring

of the power quality in energy grids

Digital fault recorder

(transient fault recorder)


of the protocol standard IEC 61850

Download the brochure

Example configuration for Power Quality

Proving electric power quality in line with standards

Electrical power quality (EPQ) is defined by characteristics such as frequency, magnitude, curve shape and symmetry of the phase voltages. It is adversely affected to an ever greater extent by the power grid itself, which is increasingly being fed from distributed sources, but also by the consumers. The modular ibaPQU-S system allows the quality in energy grids to be monitored continuously. ibaPQU measures raw values such as current and voltage in sync with the grid and internally calculates the characteristics relevant for power quality according to the standard IEC 61000-4-30 Class A and is hence suitable for evaluations according to EN 50160. Analysis of the characteristics values, especially when combined with other plant and process data, is a major basis for improving the quality and availability of power grids.

High-speed acquisition of dynamic processes

The scalable iba system allows tailoring the fault recorder function to the needs of customers in a flexible and individual way. Fast transient signal changes can be detected in the range between 1 kHz and 100 kHz using suitable acquisition hardware and recorded in high resolution.

Since the fault recorder only records the measured data when a fault occurs, ibaPDA first buffers the data internally. When a fault condition occurs, recording of the data is triggered.

When several thousand signals have to be measured synchronously with a high sampling rate in complex facilities, multiple ibaPDA systems are interconnected using optical fiber and the data are recorded with sample precision (multistation functionality).

Standard for energy automation

The transmission protocol IEC61850 has become the protocol standard for protection and control of electrical medium and high-voltage switchgear. IEC61850 further increases the application spectrum of ibaPDA.

Products for Power Quality


Power Quality Unit ibaPQU-S

The Power Quality Unit ibaPQU-S can be used for high-accuracy monitoring of the power quality in energy grids. For this purpose, characteristics of electric power quality are calculated according to the standard and are acquired and recorded by ibaPDA.

Learn more



As central part of the iba system, ibaPDA has been proving itself as one of the most versatile data acquisition systems for maintenance and production for years. Client-server architecture, flexible recording, simple configuration owing to auto-detect are just some of the convincing features.

Learn more


ibaPDA supports IEC 61850

The standard IEC 61850 (Edition 2) describes a transmission protocol for control and protection technology in electrical medium- and high-voltage switchgear. The ibaPDA interface IEC61850 allows integrating IEC-61850 compatible protection devices into the iba system.

Order information

Please contact your local sales partner

Order No. Name Description
10.150000 ibaPQU-S Power Quality Unit
10.124600 ibaMS3xAI-1A Input module with 3 analog current inputs ± 3.0 A
10.124610 ibaMS3xAI-1A Input module with 3 analog current inputs ± 15.0 A
10.124620 ibaMS3xAI-1A/100A Input module with 3 analog current inputs ± 6.25 A (± 100 A for 1 s)
10.124521 ibaMS4xAI-380VAC Input module with 4 analog voltage inputs, 380 V AC
10.124500 ibaMS8xAI-110VAC Input module with 8 analog voltage inputs, 110 V AC
10.124100 ibaMS16xAI-10V Input module with 16 analog voltage inputs ± 10 V
10.124101 ibaMS16xAI-10V-HI Input module with 16 analog voltage inputs ± 10 V, high impedance
10.124102 ibaMS16xAI-24V Input module with 16 analog voltage inputs ± 24 V
10.124103 ibaMS16xAI-24V-HI Input module with 16 analog voltage inputs ± 24 V, high impedance
10.124110 ibaMS16xAI-20mA Input module with 16 analog voltage inputs ± 20 V
10.124200 ibaMS16xDI-220V* Input module with 16 digital inputs ± 220 V
10.124201 ibaMS16xDI-24V* Input module with 16 digital inputs ± 24 V
10.124210 ibaMS32xDI-24V* Input module with 32 digital inputs ± 24 V
10.124000 ibaPADU-B4S Subrack for a central unit and 4 modules
Order No. Name Description
30.600640 ibaPDA-V6-64 Basic package server/client bundle for 64 signals
30.602560 ibaPDA-V6-256 Basic package server/client bundle for 256 signals
30.610240 ibaPDA-V6-1024 Basic package server/client bundle for 1024 signals
30.620480 ibaPDA-V6-2048 Basic package server/client bundle for 2048 signals
30.666660 ibaPDA-V6-unlimited Basic package server/client bundle for an unlimited number of signals
30.001930 ibaPDA Multistation License Expanded license for multistation operation
31.001090 ibaPDA-Interface-IEC61850-Client IEC61850 communication interface
30.700064 ibaHD-Server-T-64 Basic license HD server function for 64 tags (signals)
30.700256 ibaHD-Server-T-256 Basic license HD server function for 256 tags (signals)
30.701024 ibaHD-Server-T-1024 Basic license HD server function for 1024 tags (signals)
30.702048 ibaHD-Server-T-2048 Basic license HD server function for 2048 tags (signals)
30.706666 ibaHD-Server-T-unlimited Basic license HD server function for unlimited tags (signals)

Additionally, license expansions are available for ibaPDA and ibaHD server to increase the number of signals, clients and data stores.